Turns still images into cinematic motion-controlled videos instantly.
Who it's for: creators who want this pipeline in ComfyUI without assembling nodes from scratch. Not for: one-click results with zero tuning - you still choose inputs, prompts, and settings.
Open preloaded workflow on RunComfy
Open preloaded workflow on RunComfy (browser)
Why RunComfy first
- Fewer missing-node surprises - run the graph in a managed environment before you mirror it locally.
- Quick GPU tryout - useful if your local VRAM or install time is the bottleneck.
- Matches the published JSON - the zip follows the same runnable workflow you can open on RunComfy.
When downloading for local ComfyUI makes sense - you want full control over models on disk, batch scripting, or offline runs.
How to use (local ComfyUI)
1. Load inputs (images/video/audio) in the marked loader nodes.
2. Set prompts, resolution, and seeds; start with a short test run.
3. Export from the Save / Write nodes shown in the graph.
Expectations - First run may pull large weights ; cloud runs may require a free RunComfy account .
Overview
This setup helps you turn static images into cinematic video clips enhanced by motion-aware prompts. It combines LTX 2.3 video generation with Sulphur 2 motion control for smoother transitions and lifelike camera moves. With segmented prompt sequencing, you can define micro-actions for each moment. It supports realistic lighting, expressive movement, and scene continuity. The system provides an efficient path to transform images into professional-level cinematic storytelling sequences.
Important nodes:
Key nodes in Comfyui LTX 2.3 Sulphur 2 Prompt Relay workflow
PromptRelaySmartEncode (#610)
Purpose: Translates your beat‐by‐beat “smart prompt” into properly timed text conditioning for the whole clip. Use global_prompt for unchanging details (style, subject, lighting) and smart_prompt for the action sequence. Two authoring styles are supported: inline segments separated by | with optional proportional tags like [0-50] , or block headers like “Scene 1:” that weight segments by range. Keep one syntax per prompt to avoid ambiguity. Reference: ComfyUI‐PromptRelay .
LTXVImgToVideoInplaceKJ (#617)
Purpose: Locks the first frame’s look and gently propagates it through motion. If identity or wardrobe drifts, raise its image adherence; if motion seems constrained, lower it to allow more dynamics. Balance this with your Sulphur 2 LoRA strength so the reference remains stable without over‐freezing motion.
LoraLoaderModelOnly (#628) — Sulphur 2 motion LoRA
Purpose: Injects the Sulphur 2 fine‐tune to bias motion continuity, trajectory smoothness, and action staging. Increase strength_model to emphasize guided movement across segments; reduce it if you see over‐constraint or repeated patterns. Adjust in tandem with ImgToVideoInplace strength to keep subject fidelity and motion energy in harmony.
LTXVConditioning (#164)
Purpose: Consolidates positive/negative conditioning for LTX‐2.3 and sets the clip’s frame rate. If you lengthen the shot, revisit your Prompt Relay segment weights so the relative timing still matches the intended beats.
SamplerCustom (#561)
Purpose: Runs the denoising pass using your chosen sampler and schedule. If motion is jittery, try a slightly smoother schedule or a sampler known for temporal stability; if prompts under‐steer, modestly raise guidance while watching for over‐saturation. Use VisualizeSigmasKJ to sanity‐check the schedule’s shape before long runs.
Notes
LTX 2.3 Sulphur 2 Prompt Relay Workflow in ComfyUI | Image2Video Motion Control - see RunComfy page for the latest node requirements.
